In the event the shell clears the chamber wall, the ejector springs forward, popping the shell out on the gun from the ejection port. This method allows you to fire repeatedly without reloading. Machine Gun Blowback Techniques A blowback program is one area just like a recoil procedure, apart from https://machguns.com/product/lot-1496-rock-island-armory-m60-machine-gun-class-iii-nfa/